منابع مشابه
Primeval symmetry breaking
A detailed examination of the Killing equations in Robertson– Walker coordinates shows how the addition of matter and/or radiation to a de Sitter Universe breaks the symmetry generated by four of its Killing fields. The product U = a2 Ḣ of the squared scale parameter by the time-derivative of the Hubble function encapsulates the relationship between the two cases: the symmetry is maximal when U...
متن کاملMore from the Primeval Forest
two octavo volumes; as this has been translated into English, we gather that it is a book of some consequence. Yet, he has dragged himself away from all his interests in Europe and devoted a valuable part of his life to medical missionary work in equatorial Africa. Such a man must be either a restless crank or a true altruist, and, as it is obvious from his writings that Dr. Schweitzer is not t...
متن کاملUV Properties of Primeval Galaxies
The problem of UV properties of primeval galaxies is briefly assessed from the theoretical point of view discussing its impact on the definition of the cosmological model.
متن کاملAntimicrobial Peptides: Primeval Molecules or Future Drugs?
1 Graduate Program in Life Sciences, Microbiology and Immunology Program, School of Medicine, University of Maryland, Baltimore, Maryland, United States of America, 2 Department of Microbial Pathogenesis, Dental School, University of Maryland, Baltimore, Maryland, United States of America, 3 Department of Microbiology and Immunology, School of Medicine, University of Maryland, Baltimore, Maryla...
متن کاملPrimeval Corrections to the CMB Anisotropies
We show that deviations of the quantum state of the inflaton from the thermal vacuum of inflation may leave an imprint in the CMB anisotropies. The quantum dynamics of the inflaton in such a state produces corrections to the inflationary fluctuations, which may be observable. Because these effects originate from IR physics below the Planck scale, they will dominate over any trans-Planckian impr...
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ژورنال
عنوان ژورنال: Nature
سال: 1913
ISSN: 0028-0836,1476-4687
DOI: 10.1038/090572b0